KR101590065B1 - Prefabricated composite truss girder and method for constructing thereof - Google Patents

Abstract

The present invention relates to a prefabricated composite truss girder comprising: an upper chord member made with reinforced concrete; a lower chord member formed on a lower side to be separated and made of reinforced concrete; a diagonal brace made of steel, formed between an upper and a lower chord member, and having a cut groove on both ends; and a connector connecting a diagonal brace and the upper chord member or connecting the diagonal brace and the lower chord member. The connector comprises: a horizontal plate attached and installed in a surface of the upper or lower chord member made of reinforced concrete; a V-shaped vertical plate vertically joined to one side of the horizontal plate and inserted and joined to the cut groove formed on an end of a diagonal brace; and a plurality of stud bolts embedded into the upper or lower chord member made of reinforced concrete and formed on an other side of the horizontal plate. The present invention is capable of obtaining excellent durability, excellent economic efficiency, and beautiful appearance by connecting the upper and lower chord members made with reinforced concrete; and the diagonal brace made of steel. In addition, the present invention is capable of obtaining excellent quality, improved constructability, and economical effect by completing a bridge by manufacturing the upper and lower chord members made with reinforced concrete and the diagonal brace made of steel in a factory; thereafter assembling the same in the factory or a site.

Description

TECHNICAL FIELD [0001] The present invention relates to a composite type truss girder and a method of constructing the same,

The present invention relates to an assembled composite truss girder formed by including a reinforced concrete phase current, a reinforced concrete bottom current, a steel material, and a method of constructing the composite truss girder, and more particularly, Type composite truss girder and a construction method thereof.

Since the conventional truss girder is large in size, it was mainly installed in the field, which made it difficult to secure site in the field and difficulty in quality control. In addition, when the truss girder is formed of only reinforced concrete, it is formed of a concrete material which is vulnerable to the tensile force to the portion where tensile force is applied. Therefore, cracks are generated in the concrete and the durability of the truss girder is hindered. There was a problem. In addition, when the truss girder is formed of only the steel material, expensive steel material is used up to an unnecessary portion, which increases the cost, which is uneconomical.

In order to solve this problem, the present, the present, the present, and the part of the work are formed of reinforced concrete, and some of them are made of steel. In this case, the joint structure of the reinforcement is embedded in the reinforced concrete In this case, it is not easy to combine the reinforced concrete with the steel material, and there is a structural problem because it is difficult to efficiently design the point portions most vulnerable to the working load.

Patent 1: Korean Patent No. 10-1226597

In order to solve the above-mentioned problems, the present invention provides a composite type truss girder having an excellent durability, economical, and aesthetic appearance by constituting the upper and lower currents with reinforcing concrete, And to provide a construction method.

In addition, it is possible to manufacture a composite truss girder with excellent quality, improved workability, and an economical composite truss girder by producing a reinforced concrete current, a reinforced concrete bottom current and a steel material at a factory, And a method of constructing the same.

Also, it is intended to provide an assembled composite truss girder which is structurally safe and robust by improving the connection structure between the current or the reinforced concrete under current and the steel material on the reinforced concrete, and a construction method thereof.

An assembled composite truss girder according to an example of the present invention includes: an upper frame formed of a reinforced concrete; A lower end spaced apart from the lower end of the upper portion and formed of reinforced concrete; A workpiece formed between the upper and lower ends of the upper and lower ends and having cutting edges formed at both ends thereof and formed of a steel material; A connecting member for connecting the workpiece and the workpiece, or the workpiece and the workpiece; And the connecting member is a V-shaped member that is vertically coupled to one side of the horizontal plate and is inserted into and coupled to the incision groove formed at the end of the stationary member, And a plurality of stud bolts provided on the other side of the horizontal plate and embedded in the upper or lower reinforced concrete.

The connecting member may further include a buried vertical plate coupled to the other side of the horizontal plate and buried in the upper or lower reinforced concrete, and the stud bolt may be coupled to the buried vertical plate.

The connecting member may further include a buried horizontal plate coupled to the buried vertical plate and buried in the upper or lower current reinforced concrete, and the stud bolt may be coupled to the buried horizontal plate.

The connecting member further includes auxiliary vertical plates provided on both sides of the V-shaped vertical plate. The auxiliary vertical plate has an inner surface in contact with the V-shaped vertical plate, a lower surface in contact with the horizontal plate, The upper side may be formed in a gentle curved shape gradually decreasing in width from the end to the end of the work so that the local concentrated stress does not occur on the work at the end point of the auxiliary vertical plate.

Further, the connecting member may further include a semicircular strip-like reinforcing member provided on both sides of the V-shaped vertical plate, both side surfaces of which contact the outer surface of the auxiliary vertical plate, and the outer surface of which contacts the inner surface of the workpiece, And the upper side gradually decreases toward the inner side gradually toward the end portion so that the local concentrated stress does not occur in the workpiece at the end point of the reinforcing member.

In addition, the workpiece may be provided with a cutting portion in an external light at an end thereof to weld the workpiece, the reinforcing member, and the horizontal plate together when welding the workpiece and the horizontal plate.

In addition, the cutting material may be provided with a cut-in portion in the external light in the cut-out groove so that the welding material, the auxiliary vertical plate, and the vertical plate are welded together when welding the workpiece and the vertical plate.

Further, the workpiece may further include a crack prevention plate provided at the end of the cutout groove across the cutout groove, and the workpiece and the vertical plate may be arranged such that both sides of the auxiliary vertical plate contact the inner surface of the workpiece Welded joints.

In addition, the phase current may further include an end plate provided at an end of the phase plate, and a connection coupler protruding outward of the end plate, wherein the end plate includes an end plate provided at an end thereof, A sheath tube disposed therein, and a sheath tube coupler protruding outside the end plate.

A method of constructing an assembled composite truss girder according to an exemplary embodiment of the present invention is a method of constructing an assembled truss girder of an assembled type, comprising the steps of: joining the work material, the connecting material, the end plate, the connecting coupler, the sheath tube coupler, ; Fabricating the phase current including the reinforcing process, formwork installation, rebar assembly, connection material installation, end plate installation, concrete casting, concrete curing, and mold release; The lower end current including the above-mentioned rebar machining, formwork installation, rebar assembly, installation of the connecting material, installation of the end plate, installation of the fixture of the PC steel, installation of the sheath pipe, concrete pouring, concrete curing, ; ≪ / RTI > Fabricating a unit-assembled composite truss girder by connecting the phase current, the bottom current, and the workpiece; Assembling a plurality of unit-assembled composite truss girders by moving the assembled truss girders to the site, connecting the connecting couplers and the sheath tube couplers, and pouring concrete into the connecting portions; Disposing the PC steel on the sheath tube to strain and fix it; .

According to the present invention, it is possible to provide an excellent durability, economical, and aesthetic effect by combining the upper and lower currents with the reinforced concrete and combining the materials with the steel material.

In addition, it is possible to produce steel reinforced concrete current, reinforced concrete current steel, and steel material at a factory, and then assembling them at a factory and in the field to complete the bridge, thereby providing excellent quality, improved workability, and economical effect have.

In addition, by improving the connection structure between the current or reinforced concrete bottom current and the steel material on the reinforced concrete, it is possible to provide a structurally safe and robust effect.

1 is a perspective view showing an assembled type synthetic truss girder according to an example of the present invention.
Fig. 2 is a longitudinal sectional view of Fig. 1. Fig.
Fig. 3 is a perspective view showing a workpiece of an assembled type synthetic truss girder according to an example of the present invention. Fig.
4 is a perspective view showing a work material provided with a crack prevention plate of an assembled type synthetic truss girder according to an example of the present invention.
5A is a perspective view showing a connecting member of an assembled type synthetic truss girder according to an example of the present invention.
5B is a perspective view showing a state in which a workpiece is coupled to the connector of FIG. 5A.
6A is a perspective view showing a connecting material including a buried vertical plate of an assembled type synthetic truss girder according to an example of the present invention.
FIG. 6B is a perspective view showing a state where a workpiece is coupled to the connector of FIG. 6A.
7A is a perspective view showing a connecting member including a buried vertical plate and a buried horizontal plate of an assembled type synthetic truss girder according to an example of the present invention.
FIG. 7B is a perspective view showing a state in which the workpiece is coupled to the connector of FIG. 7A.
8 is a perspective view showing a state in which a workpiece is coupled to a coupling material provided with an auxiliary vertical plate and a reinforcing member of an assembled type truss girder according to an example of the present invention.
FIG. 9 is a longitudinal sectional view showing a state in which a work is joined to a connecting material provided with an auxiliary vertical plate of an assembled type synthetic truss girder according to an example of the present invention.
10 is a longitudinal sectional view showing a state in which a workpiece is coupled to a coupling material provided with an auxiliary vertical plate and a stiffener of an assembled type synthetic truss girder according to an example of the present invention.
11 is a cross-sectional view of Fig.
12A is a longitudinal sectional view showing a connecting portion of an assembled type synthetic truss girder according to an example of the present invention.
12B is a perspective view showing an end plate and connecting coupler of an assembled type synthetic truss girder according to an example of the present invention.
13 is a flowchart showing a construction method of an assembled type synthetic truss girder according to an example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the construction of an assembled type truss girder according to an example of the present invention will be described in detail with reference to the drawings.

1 and 2, an assembled composite truss girder according to an exemplary embodiment of the present invention includes an upper frame 10, a lower frame 20 spaced apart from the lower side of the upper frame 10, And a connecting member 40 for connecting the upper current 10 or the lower current 20 to the work 30.

The phase current 10 and the bottom current 20 are formed of reinforced concrete and the material 30 between the phase current 10 and the bottom current 20 is made of steel. 3) is formed at both side ends of the work 30 and is inserted into a connection member 40 to be described later and is welded or the like. The cutout groove 31 is inserted into the connection member 40, As shown in FIG. The cutting member 30 is also provided with a crack preventing plate 35 (also referred to as a cutting member) 35 across the cutting groove 31 at the inner end of the cutting groove 31 so that the cutting groove 31 does not proceed to the inside of the work 30 4) may be provided.

In order to securely and firmly and firmly combine the steel material 30 with the current 10 and the lower 20 on the reinforced concrete, the upper and lower currents 20 and 20 A connecting member 40 for connecting these members is provided. As shown in FIGS. 5A and 5B, the connecting member 40 connecting the work 30 with the image 10 and the work 30 with the bottom 20 can be divided into a top 10 or a bottom 12 A vertical plate 42 vertically coupled to one side of the horizontal plate 41 and a vertical plate 42 provided on the other side of the horizontal plate 41. The horizontal plate 41 is attached to the surface of the reinforced concrete (Here one side refers to the work material 30 side and the other side refers to the upper side 10 or the lower side 20) of the reinforced concrete of the lower side 20 or lower side 20, Quot ;, which is also used hereinafter). The work 30 is connected to the vertical plate 42 and the horizontal plate 41 by welding or the like after the vertical plate 42 is inserted into the cutout groove 31 formed at the end of the work 30, And are arranged in a V-shape inclined so as to be symmetrical, so that two workpieces 30 can be coupled to one connecting member 40. On the other hand, the stud bolt 43 coupled to the other side of the connecting member 40 by screwing or welding is buried in the concrete of the phase current 10 and the bottom current 20.

The coupling force between the coupling member 40 and the phase current 10 or the bottom current 20 is generated by the stud bolt 43 of the coupling member 40 buried in the phase current 10 or the bottom current 20. However, in the bridge, various loads such as wind load and seismic load are repeatedly and complexly operated in addition to the load of the self weight or the vehicle, and accordingly, the stud bolt 43 alone may be difficult to effectively resist the load. That is, the coupling force between the phase current 10 or the bottom 20 and the coupling material 40 may be insufficient, so that the coupling material 40 may be pulled out, separated, or separated from the phase current 10 or the bottom half 20 . 6A and 6B, the connecting member 40 is connected to the other side of the horizontal plate 41 and is inserted into the reinforced concrete of the upper side 10 or the lower side 20, (45). The buried vertical plate 45 is provided directly under the vertical plate 42 and is embedded in the reinforced concrete of the upper or lower current 10 or 20 so that the upper current 10 or the lower current 20, (40). That is, the buried vertical plate 45 is buried in the reinforced concrete of the upper phase 10 or the lower phase 20 and strongly resists not only the deformation in the direction of the diagonal axis or the perpendicular direction of the diagonal axis but also the torsion. The stud bolt 43 may be vertically coupled to the other side of the horizontal plate 41 or horizontally connected to the left and right sides of the embedded vertical plate 45 or may be coupled to the horizontal plate 41 and the buried vertical plate 45, So that the coupling member 40 is more firmly fixed to the phase current 10 or the bottom current 20. A hole may be formed in the buried vertical plate 45. When the buried vertical plate 45 is buried in the upper current 10 or the lower current 20, 20 may be filled with concrete, the coupling strength between the reinforced concrete of the phase current 10 or the bottom 20 and the buried vertical plate 45 may be further increased.

7A and 7B, the connection member 40 may be connected to the buried vertical plate 45 by welding or the like, and may be embedded in the reinforced concrete of the phase current 10 or the bottom current 20, And may further include a plate 46. That is, a vertical plate 45 embedded in the other side of the horizontal plate 41 is connected to the vertical plate 42 by welding or the like, and the horizontal plate 46 embedded in the embedded vertical plate 45 is welded The connecting member 40 is more firmly coupled to the upper current 10 or the lower current 20 than the connecting member 40 including only the buried vertical plate 45 so that the resistance against the drawing, So that the assembled composite truss girder is structurally very stable. That is, the buried horizontal plate 46 is buried in the concrete of the upper current 10 or the lower current 20 so as to have a strong resistance against twisting or the like as well as the longitudinal or transverse strain of the work 30. In this case, the stud bolt 43 may be vertically coupled to the other side of the buried horizontal plate 46, or may be vertically coupled to both the one side and the other side of the buried horizontal plate 46, And may also be coupled to the plate 45. The stud bolt 43 is embedded in the concrete together with the buried vertical plate 45 and the buried horizontal plate 46 so that the joint member 40 is firmly fixed to the upper current 10 or the lower current 20.

8 further includes auxiliary vertical plates 48 on both sides of the vertical plate 42 of the linking member 40 as shown in Figure 8 to further strengthen the coupling between the work 30 and the linking member 40 9), or may further include a semicircular strip-like stiffener 49 (see FIG. 10) together with the auxiliary vertical plate 48.

The auxiliary vertical plate 48 may be formed as a balanced quadrangle and may be welded to both sides of the V-shaped vertical plate 42 of the coupling member 40. The inner surface of the auxiliary vertical plate 48 may be formed in a V- The lower surface is in contact with the plate (42) and the lower surface is in contact with the horizontal plate (41). Both side surfaces are in contact with the inner surface of the work (30). By providing both side surfaces of the auxiliary vertical plate 48 in contact with the inner surface of the workpiece 30, the workpiece 30 is supported very firmly against longitudinal deformation compared to being coupled to the vertical flange only by welding. The auxiliary vertical plate 48 is provided on both sides of the V-shaped vertical plate 42, and a total of four V-shaped vertical plates 42 are provided. The cutout groove 31 of the work 30 may be provided with a cutting portion in the external light so as to increase the welding force between the work 30 and the vertical plate 42 or to increase the welding force between the work 30 and the auxiliary vertical plate 48, And the vertical plate 42 may be welded together. In this case, the coupling between the workpiece 30 and the connecting member 40 is strengthened and the supporting force is further increased. In this case, a section in which the workpiece 30, the auxiliary vertical plate 48, and the vertical plate 42 are welded together can be intermittently provided in the whole or only a part of the incision groove 31. As shown in FIG. 9, the auxiliary vertical plate 48 can be formed in a gentle curved shape with its width gradually decreasing toward the upper end, because the work 30 is deformed in the longitudinal direction It is possible to prevent the local vertical stress on the workpiece 30 from being generated by the auxiliary vertical plate 48 at the end point of the auxiliary vertical plate 48. [ In this case, welding between the workpiece 30 and the vertical plate 42 is performed only by the portion where both side surfaces of the auxiliary vertical plate 48 are in contact with the inner surface of the work 30 by stress concentration at the end of the auxiliary vertical plate 48 It is possible to prevent breakage of the welded portion.

The reinforcing member 49 is formed in a semicircular strip shape and is provided on both sides of the V-shaped vertical plate 42 of the connecting member 40 and is joined by welding or the like. Both side surfaces of the reinforcing member 49 are connected to the auxiliary vertical plate 48 The outer surface is in contact with the inner surface of the work 30 and the outer surface is in contact with the end of the outer surface of the work 30. The entire outer surface of the stiffener 49 abuts against the inner surface of the work 30, so that the longitudinal and lateral support forces of the work 30 are strengthened. As shown in FIG. 10, the reinforcing member 49 is formed so that its thickness gradually decreases inwardly from the upper end to the end, so that when the work 30 is deformed in the longitudinal direction or the transverse direction, The local concentrated stress can be prevented from being generated in the workpiece 30 by the reinforcing member 49. [

As shown in FIG. 11, an end portion of the work 30 may be provided with a narrow cut portion 33 in the external light. By forming the cutting portion 33 so as to be inclined inwardly from the outside of the work 30 to the end of the work 30 so as to strengthen the welding of the work 30 and the horizontal plate 41, The reinforcing member 49 and the horizontal plate 41 are welded together to further strengthen the connection between the work 30 and the connecting member 40. [ The welding of the work 30, the stiffener 49, and the horizontal plate 41 together may be performed around the work 30 or intermittently. That is, the work 30 and the horizontal plate 41 may be welded so that the inner end of the work 30 is tilted inward from the outside of the work 30 to contact the horizontal plate 41 (see the left cutting portion in FIG. 11) The stiffener 49 and the horizontal plate 41 are welded at the time of welding so that a part of the stiffener 49 is exposed while being inclined inwardly from the outside of the work 30 as shown in Fig. Welding and joining of the workpiece 30 and the horizontal plate 41 can be further improved.

The auxiliary vertical plate 48 and the stiffener 49 may be installed on all of the connecting members 40 constituting the assembled type synthetic truss girder. However, the connecting members 40 connecting the upper current 10 and the work 30, Or only a part of the connection member 40 or the connecting member 40 connecting the bottom member 20 and the workpiece 30 or a part of the connecting member 40 may be provided only to the connection member 40, Or may be partially provided. The auxiliary vertical plate 48 and the stiffener 49 may be welded together after the work 30 is sandwiched between the auxiliary vertical plate 48 and the stiffener 49 while being welded to the connecting member 40. [ And may be coupled to the connection member 40 after being pre-welded to the inside of the workpiece 30.

The present invention is advantageous in that it is superior in durability, economical and aesthetically pleasing by combining the upper current (10) or the lower current (20) formed of reinforced concrete with the work (30) formed of steel. In addition, the phase current 10, the bottom 20, and the work 30 are manufactured in a factory in accordance with the required specifications, then assembled in a factory, and completely assembled in the factory to produce a unit- , It is possible to complete the bridge by connecting it to the bridge, so that it is excellent in quality, easy on-site construction and easy to work, improves workability, and is economical.

As shown in FIG. 12A, the unit-assembled composite truss girders are disposed apart from each other by unit-assembled composite truss girders, and then joined by a connecting coupler 53 and a sheath tube coupler 57, Concrete is poured into the connected joint. That is, an end plate 51 as shown in FIG. 12B is provided at an end of the phase current 10 and a lower end 20, and a connecting coupler 53 is protruded to the outside of the end plate 51 . The sheath tube 55 is disposed inside the sheath tube 55 for installing the PC steel material and the sheath tube coupler 57 connecting the sheath tube 55 protrudes outside the end plate 51 do. Also, if necessary, the sheath pipe 55 may be disposed inside the phase current unit 10 for installing PC steel.

Hereinafter, a method of constructing an assembled type truss girder according to an exemplary embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 13, a method of constructing an assembled composite truss girder according to an exemplary embodiment of the present invention includes a step (S10) of preparing components, a step (S20) of producing an upper phase current, (S40) of assembling the unit-assembled composite truss girder (S30), assembling the unit-assembled composite truss girder (S50) after arranging the unit-assembled composite truss girder in the field, and stretching and fixing the PC steel (S60) . On the other hand, the construction relating to the assembled type synthetic truss girder, refer to the above description.

Step S10 of preparing the components includes the work 30, the connecting member 40, the end plate 51, the connecting coupler 53, the sheath tube coupler 57, the sheath tube 55, the PC steel, . At this time, the vertical plate 45 may be coupled to the other side of the horizontal plate 41, the horizontal plate 46 may be further coupled to the embedded vertical plate 45, The auxiliary vertical plate 48 or the stiffener 49 may be provided on both sides.

Step S20 of fabricating the phase current is carried out by performing the processes of reinforcing steel, formwork, reinforcing assembly, connecting material 40, end plate 51, concrete pouring, concrete curing, .

The step S30 of manufacturing the bottom current is performed by the following processes: steel working, formwork installation, rebar assembly, connection material 40, end plate 51, PC steel fixture installation, sheath pipe installation 55, concrete pouring, , And a form dismantling process are performed to manufacture the bottom case 20.

A step S40 of fabricating a unit-assembled composite truss girder is a step of fabricating a unit-assembled composite truss girder by connecting the phase current 10, the bottom 20, and the work 30 to each other. That is, the connecting material 40 is embedded at the correct position in the phase current 10 and the bottom current 20 in the step S20 of producing the phase current and the step S30 of producing the bottom current, The connecting member 40 embedded in the bottom 20 and the top 30 is first connected to the bottom 20 and the top 30 joined to the bottom 20, 10) (or bottom) to form a unit-assembled composite truss girder.

The step of connecting the unit-assembled composite truss girders to each other after arranging the unit-assembled composite truss girders in the field (S50) is performed by moving a plurality of unit-assembled truss girders manufactured in the above- Connecting the connecting coupler 53 and the sheath tube coupler 57, and pouring the concrete into the connecting portion.

Stretching and fixing the PC steel material (S60) is a step of placing and tentering the PC steel material in the sheath pipe 55. After the PC steel material is inserted into the sheath pipe 55, the PC steel material is strained , Grouting and curing.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Award current
20: Height current
30: Materials
31: incision groove
33:
35:
40: connector
41: Horizontal plate
42: vertical plate
43: Stud bolt
45: buried vertical plate
46: buried horizontal plate
48: auxiliary vertical plate
49: Stiffener
51: end plate
53: Connecting coupler
55: Sheath tube
57: Sheath tube coupler
S10: Step of preparing the components
S20: Steps to produce phase current
S30: Steps to make the bottom current
S40: Steps to fabricate unit-assembled composite truss girders
S50: Steps to connect the unit-assembled composite truss girders after they are placed on site
S60: Steps to strain and settle PC steels

Claims (10)

Phase current formed by reinforced concrete;
A lower end spaced apart from the lower end of the upper portion and formed of reinforced concrete;
A workpiece formed between the upper and lower ends of the upper and lower ends and having cutting edges formed at both ends thereof and formed of a steel material;
A coupling member for coupling the workpiece with the image present, and the workpiece with the bottom current; Including,
The connecting member includes a horizontal plate attached to a surface of the upper or lower reinforced concrete, a V-shaped vertical plate coupled perpendicularly to one side of the horizontal plate and inserted into the cut- And a plurality of stud bolts provided on the other side of the horizontal plate and embedded in the upper or lower reinforced concrete,
Wherein the connecting member further comprises auxiliary vertical plates provided on both sides of the V-shaped vertical plate,
The auxiliary vertical plate has a gently curved shape whose inner surface is in contact with the V-shaped vertical plate, lower surface is in contact with the horizontal plate, both side surfaces are in contact with the inner surface of the work and the upper side thereof gradually decreases in width toward the end So that local concentrated stress does not occur in the workpiece at the end point of the auxiliary vertical plate,
Wherein the connecting member further comprises a semicircular strip-shaped reinforcing member provided on both sides of the V-shaped vertical plate,
Wherein the reinforcing member has both side surfaces abutting against the outer surface of the auxiliary vertical plate and the outer surface abutting the inner surface of the workpiece to strengthen the lateral support force of the workpiece and the upper side gradually decreases inward toward the end, Thereby preventing localized concentrated stresses from occurring in said workpiece.
The method according to claim 1,
The connecting member further includes a buried vertical plate coupled to the other side of the horizontal plate and embedded in the upper or lower reinforced concrete,
And the stud bolts are coupled to the buried vertical plate.
The method of claim 2,
The connecting member further comprises a buried horizontal plate coupled to the buried vertical plate and embedded in the upper or lower current reinforced concrete,
And the stud bolts are coupled to the buried horizontal plate.
delete delete The method according to claim 1,
Wherein the cutter is provided with a cutting portion in an external light at an end thereof so that the workpiece, the reinforcement and the horizontal plate are welded together to strengthen the joint when welded to the workpiece and the horizontal plate.
The method according to claim 1,
Wherein the cutting member is provided with a cutting portion in an external light in the cutting groove to weld the workpiece, the auxiliary vertical plate, and the vertical plate together when welded to the workpiece and the vertical plate, Girder.
The method according to claim 6 or 7,
The workpiece further comprises a crack prevention plate provided at an end of the cutout groove across the cutout groove,
Wherein the workpiece and the vertical plate are welded only to a portion where both side surfaces of the auxiliary vertical plate are in contact with an inner side surface of the workpiece.
7. The method according to any one of claims 1 to 3, 6,
Wherein the phase current further comprises an end plate provided at an end thereof and a connection coupler protruding outside the end plate,
And a sheath tube disposed inside the connecting coupler, and a sheath tube coupler protruding outward from the end plate, wherein the sheath tube coupler is disposed at an end of the end plate, Type synthetic truss girder.
In the construction method of the assembled type synthetic truss girder of claim 9,
Preparing the workpiece, the connecting member, the end plate, the connecting coupler, the sheath tube coupler, the sheath tube, the PC steel, and the reinforcing bar;
Fabricating the phase current including the reinforcing process, formwork installation, rebar assembly, connection material installation, end plate installation, concrete casting, concrete curing, and mold release;
The lower end current including the above-mentioned rebar machining, formwork installation, rebar assembly, installation of the connecting material, installation of the end plate, installation of the fixture of the PC steel, installation of the sheath pipe, concrete pouring, concrete curing, ; ≪ / RTI >
Fabricating a unit-assembled composite truss girder by connecting the phase current, the bottom current, and the workpiece;
Assembling a plurality of unit-assembled composite truss girders by moving the assembled truss girders to the site, connecting the connecting couplers and the sheath tube couplers, and pouring concrete into the connecting portions;
Disposing the PC steel on the sheath tube to strain and fix it; A method of constructing a composite truss girder comprising:

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